Title:
METHOD FOR TREATING MAGNESIUM-CONTAINING WASTE LIQUID
Document Type and Number:
WIPO Patent Application WO/2024/045531
Kind Code:
A1
Abstract:
Disclosed is a method for treating magnesium-containing waste liquid, comprising the following steps: S1, mixing a magnesium precipitation agent with magnesium-containing wastewater, performing solid-liquid separation, and collecting solid-phase residues, the temperature of the mixing being 95-100°C, and the magnesium-containing wastewater containing Mg2+ and SO4
2-; S2, beating the solid-phase residues obtained in step S1 and performing primary carbonization on same, performing solid-liquid separation on the carbonized product, and collecting a liquid-phase component; S3, pyrolyzing the liquid-phase component obtained in step S2, performing solid-liquid separation on the pyrolysis product, and collecting a solid-phase product; and S4, performing secondary carbonization on the solid-phase product obtained in step S3, and collecting a liquid-phase component of the carbonized product, so as to prepare a magnesium bicarbonate refined solution. The magnesium precipitation agent comprises at least one of calcium oxide and calcium hydroxide; and the primary carbonization and the secondary carbonization both make a reactant to be in contact with carbon dioxide. The method for treating magnesium-containing wastewater of the present invention can effectively recover and produce high-purity magnesium salts.
Inventors:
ZENG ZHIJIA (CN)
LI CHANGDONG (CN)
RUAN DINGSHAN (CN)
CHEN RUOKUI (CN)
QIAO YANCHAO (CN)
MAO QINGMIN (CN)
LI CHANGDONG (CN)
RUAN DINGSHAN (CN)
CHEN RUOKUI (CN)
QIAO YANCHAO (CN)
MAO QINGMIN (CN)
Application Number:
PCT/CN2023/079349
Publication Date:
March 07, 2024
Filing Date:
March 02, 2023
Export Citation:
Assignee:
GUANGDONG BRUNP RECYCLING TECHNOLOGY CO LTD (CN)
HUNAN BRUNP RECYCLING TECH CO LTD (CN)
HUNAN BRUNP RECYCLING TECH CO LTD (CN)
International Classes:
C01F5/24; C01D5/00; C01F5/06; C01F11/08; C01F11/46
Foreign References:
| CN115385366A | 2022-11-25 | |||
| CN101104522A | 2008-01-16 | |||
| CN101519219A | 2009-09-02 | |||
| CN101760641A | 2010-06-30 | |||
| CN107098366A | 2017-08-29 | |||
| US20160200587A1 | 2016-07-14 |
Other References:
ZHIQIANG WANG, LIU JIAXIANG; RAO FAMING: "Preparation of High Purity Basic Magnesium Carbonate with Light-burned Dolomite by Twice-Carbonation Method", JOURNAL OF THE CHINESE CERAMIC SOCIETY, vol. 41, no. 10, 24 September 2013 (2013-09-24), pages 1437 - 1441, XP093145520, DOI: 10.7521/j.issn.0454-5648.2013.10.19
RONGGUANG ZHENG, YAN SU: "Study of Distracting High Purity Magnaria By Carlionation Twice", JOURNAL OF EAST CHINA GEOLOGICAL INSTITUTE, vol. 20, no. 2, 30 June 1997 (1997-06-30), pages 173 - 177, XP093145515
LINCHENG LIU, ZUO HAIBIN; XU ZHIQIANG: "Effect of powdered carbon on the reductive decomposition of gypsum", JIANGXI METALLURGY, 北京科技大学钢铁冶金新技术国家重点实验室,北京100083, vol. 41, no. 3, 30 June 2021 (2021-06-30), pages 1 - 10, XP093145517, ISSN: 1006-2777, DOI: 10.19864/j.cnki.jxye.2021.03.001
RONGGUANG ZHENG, YAN SU: "Study of Distracting High Purity Magnaria By Carlionation Twice", JOURNAL OF EAST CHINA GEOLOGICAL INSTITUTE, vol. 20, no. 2, 30 June 1997 (1997-06-30), pages 173 - 177, XP093145515
LINCHENG LIU, ZUO HAIBIN; XU ZHIQIANG: "Effect of powdered carbon on the reductive decomposition of gypsum", JIANGXI METALLURGY, 北京科技大学钢铁冶金新技术国家重点实验室,北京100083, vol. 41, no. 3, 30 June 2021 (2021-06-30), pages 1 - 10, XP093145517, ISSN: 1006-2777, DOI: 10.19864/j.cnki.jxye.2021.03.001
Attorney, Agent or Firm:
JIAQUAN IP LAW (CN)
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